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Numerical investigation on the effect of blade sweep on the performance of Wells turbine

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  • Kim, T.H.
  • Setoguchi, T.
  • Kaneko, K.
  • Raghunathan, S.

Abstract

A Wells turbine is one of the simplest and promising self-rectifying air turbines which is basic to the needs of the near future and likely to be economically viable. With the recent development in computer hardware and software, it has now become practicable to conduct a reasonable computation of three-dimensional turbulent flows through complex geometry. To investigate the effect of blade sweep on the performance of the Wells turbine, the numerical investigation was carried out under steady flow condition with a fully 3-D Navier–Stokes code for two kinds of blades, NACA0020 and CA9. As a result, it was found that the performance of the Wells turbine is considerably influenced by the blade sweep. The optimum blade sweep ratio (f=0.35) for the NACA0020 was found. This value is just the same as one obtained experimentally by the authors in the past. It was also found that the overall turbine performance for the NACA0020 is better than that for the CA9. It was shown that the numerical method is able quite well to predict the effect of blade sweep of the Wells turbine. The detailed flow patterns for several blade sweeps were also shown and discussed in this paper.

Suggested Citation

  • Kim, T.H. & Setoguchi, T. & Kaneko, K. & Raghunathan, S., 2002. "Numerical investigation on the effect of blade sweep on the performance of Wells turbine," Renewable Energy, Elsevier, vol. 25(2), pages 235-248.
    • Handle: RePEc:eee:renene:v:25:y:2002:i:2:p:235-248
    DOI: 10.1016/S0960-1481(00)00210-X
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    Cited by:

    1. Torresi, M. & Camporeale, S.M. & Strippoli, P.D. & Pascazio, G., 2008. "Accurate numerical simulation of a high solidity Wells turbine," Renewable Energy, Elsevier, vol. 33(4), pages 735-747.
    2. Shehata, Ahmed S. & Xiao, Qing & El-Shaib, Mohamed & Sharara, Ashraf & Alexander, Day, 2017. "Comparative analysis of different wave turbine designs based on conditions relevant to northern coast of Egypt," Energy, Elsevier, vol. 120(C), pages 450-467.
    3. Dhanasekaran, T.S. & Govardhan, M., 2005. "Computational analysis of performance and flow investigation on wells turbine for wave energy conversion," Renewable Energy, Elsevier, vol. 30(14), pages 2129-2147.
    4. Thakker, A. & Dhanasekaran, T.S., 2004. "Computed effects of tip clearance on performance of impulse turbine for wave energy conversion," Renewable Energy, Elsevier, vol. 29(4), pages 529-547.
    5. Kotb, Ahmed T.M. & Nawar, Mohamed A.A. & Attai, Youssef A. & Mohamed, Mohamed H., 2022. "Performance assessment of a modified wells turbine using an integrated casing groove and Gurney flap design for wave energy conversion," Renewable Energy, Elsevier, vol. 197(C), pages 627-642.
    6. Ansarifard, Nazanin & Kianejad, S.S. & Fleming, Alan & Henderson, Alan & Chai, Shuhong, 2020. "Design optimization of a purely radial turbine for operation in the inhalation mode of an oscillating water column," Renewable Energy, Elsevier, vol. 152(C), pages 540-556.
    7. Halder, Paresh & Samad, Abdus & Kim, Jin-Hyuk & Choi, Young-Seok, 2015. "High performance ocean energy harvesting turbine design–A new casing treatment scheme," Energy, Elsevier, vol. 86(C), pages 219-231.
    8. Halder, Paresh & Samad, Abdus & Thévenin, Dominique, 2017. "Improved design of a Wells turbine for higher operating range," Renewable Energy, Elsevier, vol. 106(C), pages 122-134.
    9. Kotb, Ahmed T.M. & Nawar, Mohamed A.A. & Attai, Youssef A. & Mohamed, Mohamed H., 2023. "Performance enhancement of a Wells turbine using CFD-optimization algorithms coupling," Energy, Elsevier, vol. 282(C).
    10. Kotb, Ahmed T.M. & Nawar, Mohamed A.A. & Attai, Youssef A. & Mohamed, Mohamed H., 2024. "Impact of tapered leading-edge micro-cylinder on the performance of wells turbine for wave energy conversion: CFD-optimization algorithms coupling study," Energy, Elsevier, vol. 293(C).

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